/**
***********************************************************************
*
* Copyright 2011 Stefan Wöhle
*
* This file is part of PixelMath
*
* PixelMath is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* PixelMath is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with PixelMath. If not, see <http://www.gnu.org/licenses/>.
*
***********************************************************************
*/

#ifndef EMPTYFORMULAWIDGET_H
#define EMPTYFORMULAWIDGET_H

#include <QPushButton>
#include "formulawidget.h"
#include <QMenu>

/*********************************************************
 *
 *  EmptyFormulaWidget
 *
 *  This class is a placeholder for other FormulaWidgets.
 *  It uses a QPushButton and a QMenu to show which formulas
 *  are selectable and generates a signal after choosing one.
 *  New formula widgets should be inserted in the implementation
 *  of this class.
 *
 **********************************************************/

class EmptyFormulaWidget : public FormulaWidget
{
    Q_OBJECT
private:
    QPushButton button;
public:
    explicit EmptyFormulaWidget(QWidget *parent = 0);
private slots:
    void xTriggered();
    void yTriggered();
    void constantTriggered();
    void sineTriggered();
    void rValueTriggered();
    void gValueTriggered();
    void bValueTriggered();
    void additionTriggered();
    void subtractionTriggered();
    void multiplicationTriggered();
    void divisionTriggered();
signals:
    void formulaChoosen(FormulaWidget* formulaWidget);
};

#endif // EMPTYFORMULAWIDGET_H
